Of boston



N-PEK'ERS. PHOTO-LITHDGRAPHER, WASHINGTON, Dv U- UNITED STATES PATENTOFFICE.

SEBEUS o. MAINE, on BOSTON, MASSACHUSETTS.

COAL ANDASH SIFTER.

Specification forming part of Letters Patent No. 48,293, dated June 20,1865.

To all whom it may concern:

Be it known that I, SEBEUS G. MAINE, of Boston, in the county of Suffolkand State of Massachusetts, have invented a new and Improved FamilySieve and Safety Coal-Sifter,

of which the following is a full, clear, and exact description,reference being had to the accompanyin g drawings, making part of thisspecification, in whicli Figurel is a perspective view ofmy improvedSifter, the cover being removed. Fig. 2 is a longitudinal verticalsection through the center of the same. Fig. 3 is a transverse sectionthrough the sifting-cylinder.

The object of my invention is to produce a sitter for coal and otherarticles which shall perform its work in a rapid and efl'ectual manner,and can be easily operated by hand and it consists in a perforated cylnder the interior of which is provided with flan gcs or strips whichserve to elevate the article being sifted and throw it forcibly againstthe opposite side of the screen, whereby the operation of sifting isgreatly accelerated, and is performed in a most effectual manner. 7

To enable others skilled in the art to understand and use my invention,I will proceed to describe the manner in which I have carried it out. V

In the said drawings, A is a box,of metal or other suitable material,inbearings a in which runs the shaft B from hubs O, on which project thebent rods b, to which is secured a perforated cylinder, D, placedhorizontally or slightly inclined, as seen in Fig. 2, the longitudinalportions of these rods to which the cylinder is fastened being inclinedto its axis, as seen dotted in Fig. 1.

c are strips of metal, which taper gradually from the inlet to theoutlet of the cylinder, and are attached to the rods 1). On revolvingthe cylinder these strips 0 serve to raise the coal or other substancebeing sifted and throw it forcibly against the shaftB and sides of thecylinder D,whereby it is turned over and over, and the dust iseflectua-lly shaken out and falls into a receptacle, E, beneath, theinclination of the strips 0 to the Shaft B, in connection with theirtapering form, serving to give the contents a forward progressive motiontoward the outlet 11 in the box A, where it is received by the box orhod F.

The size of the outlet at may be contracted by a slide, 0, in order tosubject. the contents of the cylinder for a longer time to the screeningprocess; or the outlet may be closed by the slide en ti rely, ifdesired. The slide 0 is hinged atf, and when raised may be used as acover for the box F, as seen in Figs. 1 and 2.

The hopper G, into which is placed the article to be sifted, is providedwith a cover, 9.

The box A is closed by means of a cover, h, which prevents the dust fromescaping.

To the end of the shaft B is attached a crank, H, by which the cylinderis revolved.

In a sitter constructed as above described the cylinder revolves with aneasy and uniform motion, and the contents being continually dischargedthe weight and pressure on the bear ings is gradually relieved, and theoperation thus facilitated.

It is evident that by altering the size of the cylinder and its meshesthe sifter may be applied to a variety of purposes.

What I claim as my invention, and desire to secure by Letters Patent,is-- S. G. MAINEV Witnesses:

P. E. TESGHEMACHER, N. W. STEARNS.

